Hamilton Factory Dynavar Mainspring for 20/0 & 21/0s Hamilton No. 36432 - Alloy

Hamilton Factory Dynavar Mainspring for 20/0s & 21/0s Movements, Catalog No. 36432, alloy, new in envelope. Made for Grades 995, 995A, 997 & 721, and perhaps others. See image for precise characteristics. I likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.